What was the cartwright' s job in medieval times?

A cartwright made (in Old English "wrought") carts, which have only two wheels - wagons have four and are generally much larger.

The cartwright might make the wheels himself, or obtain them from a wheelwright; the wheels would be made of three different types of wood because of their different properties. Medieval wheels had short sections of iron joined to form the ring or tyre which held the whole wheel together.

Carts might have simple wooden sides, or a canvas cover, or a kind of railing each side, depending on its use.

A carter was a man who used a cart, either walking alongside the oxen that pulled it or sitting on the front of the cart itself.